package Utils;

import java.awt.Graphics;
import java.awt.GraphicsConfiguration;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
import java.awt.HeadlessException;
import java.awt.Image;
import java.awt.Transparency;
import java.awt.image.BufferedImage;
import java.awt.image.ColorModel;
import java.awt.image.PixelGrabber;

import javax.swing.ImageIcon;


//  http://www.exampledepot.com
public final class  Utils {
	// This method returns a buffered image with the contents of an image
	public static BufferedImage toBufferedImage(Image image) {
	    if (image instanceof BufferedImage) {
	        return (BufferedImage)image;
	    }

	    // This code ensures that all the pixels in the image are loaded
	    image = new ImageIcon(image).getImage();

	    // Determine if the image has transparent pixels; for this method's
	    // implementation, see Determining If an Image Has Transparent Pixels
	    boolean hasAlpha = hasAlpha(image);

	    // Create a buffered image with a format that's compatible with the screen
	    BufferedImage bimage = null;
	    GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
	    try {
	        // Determine the type of transparency of the new buffered image
	        int transparency = Transparency.OPAQUE;
	        if (hasAlpha) {
	            transparency = Transparency.BITMASK;
	        }

	        // Create the buffered image
	        GraphicsDevice gs = ge.getDefaultScreenDevice();
	        GraphicsConfiguration gc = gs.getDefaultConfiguration();
	        bimage = gc.createCompatibleImage(
	            image.getWidth(null), image.getHeight(null), transparency);
	    } catch (HeadlessException e) {
	        // The system does not have a screen
	    }

	    if (bimage == null) {
	        // Create a buffered image using the default color model
	        int type = BufferedImage.TYPE_INT_RGB;
	        if (hasAlpha) {
	            type = BufferedImage.TYPE_INT_ARGB;
	        }
	        bimage = new BufferedImage(image.getWidth(null), image.getHeight(null), type);
	    }

	    // Copy image to buffered image
	    Graphics g = bimage.createGraphics();

	    // Paint the image onto the buffered image
	    g.drawImage(image, 0, 0, null);
	    g.dispose();

	    return bimage;
	}
	
	// This method returns true if the specified image has transparent pixels
	public static boolean hasAlpha(Image image) {
	    // If buffered image, the color model is readily available
	    if (image instanceof BufferedImage) {
	        BufferedImage bimage = (BufferedImage)image;
	        return bimage.getColorModel().hasAlpha();
	    }

	    // Use a pixel grabber to retrieve the image's color model;
	    // grabbing a single pixel is usually sufficient
	     PixelGrabber pg = new PixelGrabber(image, 0, 0, 1, 1, false);
	    try {
	        pg.grabPixels();
	    } catch (InterruptedException e) {
	    }

	    // Get the image's color model
	    ColorModel cm = pg.getColorModel();
	    return cm.hasAlpha();
	}
}
